Data Sheet

LINEAR MAGNETIC FIELD SENSORS

HMC1021/1022 SPECIFICATIONS

Characteristic Conditions** Min Typ Max Unit

Bridge Supply Vbridge referenced to GND 5 25 Volts

Bridge Resistance Bridge current = 5mA 800 1100 1300 Ω

Operating Temperature (1) HMC1021S, 1021Z, 1022 -55 150 °C

HMC1021D* - 55 300*

Storage Temperature (1) Unbiased -55 175 °C

Field Range (1) Full scale (FS), — total applied field -6 +6 gauss

Best fit straight line ±1 gauss 0.05

Linearity Error (1) ±3 gauss 0.4 %FS

±6 gauss 1.6

Hysteresis Error (1) 3 sweeps across ±3 gauss 0.08 %FS

Repeatability Error (1) 3 sweeps across ±3 gauss 0.08 %FS

Bridge Offset Offset = (OUT+) – (OUT-), Field = 0 gauss -10 ±2.5 11.25 mV

After Set pulse, Vbridge=5V

Sensitivity S/R Current = 0.5A 0.8 1.0 1.25 mV/V/gauss

Noise Density (1) Noise at 1Hz, Vbridge=5V 48 nV/√Hz

Resolution (1) Bandwidth=10Hz, Vbridge=5V 85 µgauss

Bandwidth (1) Magnetic signal (lower limit = DC) 5 MHz

OFFSET Strap Measured from OFFSET+ to OFFSET- 38 50 60 Ω

OFFSET Strap Ω Tempco (1) T

A = -40 to 125° C 0.39 %/° C

OFFSET Field (1) Field applied in sensitive direction 4.0 4.6 6.0 mA/gauss

Set/Reset Strap Measured from S/R+ to S/R- 5.5 7.7 9 Ω

Set/Reset Current 2µs current pulse, 1% duty cycle 0.5 0.5 4.0 Amp

Set/Reset Ω Tempco (1) T

A = -40 to 125° C 0.37 %/° C

Disturbing Field (1) Sensitivity starts to degrade. Use S/R 20 gauss

pulse to restore sensitivity.

Sensitivity Tempco (1) T

A = -40 to 125° C Vbridge=5V -0.32 -0.3 -0.28 %/° C

Ibridge=5mA -0.06

Bridge Offset Tempco (1) T

A = -40 to 125° C no Set/Reset ±0.05 %/° C

Vbridge=5V with Set/Reset ±0.001

Resistance Tempco (1) Vbridge=5V, T

A = –40 to 125° C 0.25 %/° C

Cross-Axis Effect (1) Cross field=1 gauss

(see AN-205) Happlied=±1 gauss +0.3 %FS

Max. Exposed Field (1) No perming effect on zero reading 10000 gauss

Set/Reset (1) S/R current ≥ 0.5 Amps 30 µV

*Please reference data sheet, HTMC1021D for specifications.

(1) Not tested in production, guaranteed by characterization.

Units: 1 gauss (G) = 1 Oersted (in air), 1G = 79.58 A/m,

1G = 10E-4 Tesla, 1G = 10E5 gamma

**Tested at 25° C except otherwise stated.